Messages in this thread Patch in this message | | | From | Hamza Mahfooz <> | Subject | [PATCH] dma debug: report -EEXIST errors in add_dma_entry | Date | Tue, 18 May 2021 08:54:43 -0400 |
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Since, overlapping mappings are not supported by the DMA API we should report an error if active_cacheline_insert returns -EEXIST.
Suggested-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Hamza Mahfooz <someguy@effective-light.com> --- kernel/dma/debug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index 14de1271463f..dadae6255d05 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -566,11 +566,9 @@ static void add_dma_entry(struct dma_debug_entry *entry) if (rc == -ENOMEM) { pr_err("cacheline tracking ENOMEM, dma-debug disabled\n"); global_disable = true; + } else if (rc == -EEXIST) { + pr_err("cacheline tracking EEXIST, overlapping mappings aren't supported\n"); } - - /* TODO: report -EEXIST errors here as overlapping mappings are - * not supported by the DMA API - */ } static int dma_debug_create_entries(gfp_t gfp) -- 2.31.1
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